SYMBOLCOMMON_NAMEaka. SYNONYMS
win.mirai (Back to overview)

Mirai


There is no description at this point.

References
2019-05-08Verizon Communications Inc.Verizon Communications Inc.
@techreport{inc:20190508:2019:3c20a3b, author = {Verizon Communications Inc.}, title = {{2019 Data Breach Investigations Report}}, date = {2019-05-08}, institution = {Verizon Communications Inc.}, url = {https://enterprise.verizon.com/resources/reports/2019-data-breach-investigations-report.pdf}, language = {English}, urldate = {2020-05-10} } 2019 Data Breach Investigations Report
BlackEnergy Cobalt Strike DanaBot Gandcrab GreyEnergy Mirai Olympic Destroyer SamSam
2017-03-29ImpervaDima Bekerman
@online{bekerman:20170329:new:e4007ca, author = {Dima Bekerman}, title = {{New Mirai Variant Launches 54 Hour DDoS Attack against US College}}, date = {2017-03-29}, organization = {Imperva}, url = {https://www.incapsula.com/blog/new-mirai-variant-ddos-us-college.html}, language = {English}, urldate = {2020-01-05} } New Mirai Variant Launches 54 Hour DDoS Attack against US College
Mirai
2017-02-21Kaspersky LabsGReAT
@online{great:20170221:newish:1c13271, author = {GReAT}, title = {{New(ish) Mirai Spreader Poses New Risks}}, date = {2017-02-21}, organization = {Kaspersky Labs}, url = {https://securelist.com/blog/research/77621/newish-mirai-spreader-poses-new-risks/}, language = {English}, urldate = {2019-12-20} } New(ish) Mirai Spreader Poses New Risks
Mirai
2017-02-10Twitter (@PhysicalDrive0)@PhysicalDrive0
@online{physicaldrive0:20170210:mirai:51440a0, author = {@PhysicalDrive0}, title = {{Tweet on Mirai Windows Version}}, date = {2017-02-10}, organization = {Twitter (@PhysicalDrive0)}, url = {https://twitter.com/PhysicalDrive0/status/830070569202749440}, language = {English}, urldate = {2019-07-09} } Tweet on Mirai Windows Version
Mirai
Yara Rules
[TLP:WHITE] win_mirai_auto (20200817 | autogenerated rule brought to you by yara-signator)
rule win_mirai_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-08-17"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mirai"
        malpedia_rule_date = "20200817"
        malpedia_hash = "8c895fd01eccb47a6225bcb1a3ba53cbb98644c5"
        malpedia_version = "20200817"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using yara-signator.
     * The code and documentation / approach is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { ff15???????? 8985ccfeffff 83bdccfeffff00 7f08 83c8ff e9???????? 8d85d0feffff }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8985ccfeffff         | mov                 dword ptr [ebp - 0x134], eax
            //   83bdccfeffff00       | cmp                 dword ptr [ebp - 0x134], 0
            //   7f08                 | jg                  0xa
            //   83c8ff               | or                  eax, 0xffffffff
            //   e9????????           |                     
            //   8d85d0feffff         | lea                 eax, [ebp - 0x130]

        $sequence_1 = { ff7508 8b4dfc e8???????? 894508 8b4508 c9 c20800 }
            // n = 7, score = 100
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   e8????????           |                     
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   c9                   | leave               
            //   c20800               | ret                 8

        $sequence_2 = { eb03 83c8ff 39442428 7570 81e20000f07f 81c200001000 8954242c }
            // n = 7, score = 100
            //   eb03                 | jmp                 5
            //   83c8ff               | or                  eax, 0xffffffff
            //   39442428             | cmp                 dword ptr [esp + 0x28], eax
            //   7570                 | jne                 0x72
            //   81e20000f07f         | and                 edx, 0x7ff00000
            //   81c200001000         | add                 edx, 0x100000
            //   8954242c             | mov                 dword ptr [esp + 0x2c], edx

        $sequence_3 = { f3ab 6804040000 6a00 8b857cffffff 05d4080000 50 e8???????? }
            // n = 7, score = 100
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   6804040000           | push                0x404
            //   6a00                 | push                0
            //   8b857cffffff         | mov                 eax, dword ptr [ebp - 0x84]
            //   05d4080000           | add                 eax, 0x8d4
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_4 = { 8d4dfc e8???????? 50 e8???????? 59 50 8b4dd0 }
            // n = 7, score = 100
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]

        $sequence_5 = { f7d8 5b c3 8b460c 53 55 50 }
            // n = 7, score = 100
            //   f7d8                 | neg                 eax
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   50                   | push                eax

        $sequence_6 = { ff7508 8b8df8f6ffff 83c114 e8???????? 898554ffffff 83bd54ffffff00 0f8c2a010000 }
            // n = 7, score = 100
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8b8df8f6ffff         | mov                 ecx, dword ptr [ebp - 0x908]
            //   83c114               | add                 ecx, 0x14
            //   e8????????           |                     
            //   898554ffffff         | mov                 dword ptr [ebp - 0xac], eax
            //   83bd54ffffff00       | cmp                 dword ptr [ebp - 0xac], 0
            //   0f8c2a010000         | jl                  0x130

        $sequence_7 = { 8b8534ffffff 40 898534ffffff 83bd34ffffff08 7330 8b8528ffffff 038534ffffff }
            // n = 7, score = 100
            //   8b8534ffffff         | mov                 eax, dword ptr [ebp - 0xcc]
            //   40                   | inc                 eax
            //   898534ffffff         | mov                 dword ptr [ebp - 0xcc], eax
            //   83bd34ffffff08       | cmp                 dword ptr [ebp - 0xcc], 8
            //   7330                 | jae                 0x32
            //   8b8528ffffff         | mov                 eax, dword ptr [ebp - 0xd8]
            //   038534ffffff         | add                 eax, dword ptr [ebp - 0xcc]

        $sequence_8 = { 50 6a03 ff750c ff7508 e8???????? 83c410 6a00 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6a03                 | push                3
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   6a00                 | push                0

        $sequence_9 = { ffd1 83c404 80be8403000000 7409 56 e8???????? 83c404 }
            // n = 7, score = 100
            //   ffd1                 | call                ecx
            //   83c404               | add                 esp, 4
            //   80be8403000000       | cmp                 byte ptr [esi + 0x384], 0
            //   7409                 | je                  0xb
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

    condition:
        7 of them and filesize < 7086080
}
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